Results 31 to 40 of about 145,679 (305)

Evaluation of Walnut Kernel Quality (as Degree of Crushing) Obtained Under Impact Loading

Journal of Agricultural Machinery, 2014
In this research the quality of walnut kernels under impact loading were studied. Due to unavailability of specific varieties of walnut in Iran, the tests were carried out on the available genotypes.
Kh Mohammadi Ghermezgholi, H.R Ghassemzadeh, H Navid, M Moghaddam, H Ghaffari   +4 more
doaj   +1 more source

Performance enhancement of nylon/Kevlar fiber composites through viscoelastically generated pre-stress [PDF]

, 2013
Kevlar-29 fibers have high strength and stiffness but nylon 6,6 fibers have greater ductility. Thus by commingling these fibers prior to molding in a resin, the resulting hybrid composite may be mechanically superior to the corresponding single fiber ...
Cao, Cohen, Cui, Daynes, Fancey, Fancey, Fancey, Fancey, Faur-Csukat, Fazal, Fazal, Hadi, Hine, Hufenbach, Jang, Knoester, Lafitte, Mertiny, Motahhari, Motahhari, Pang, Pang, Pang, Pang, Thanomsilp, Timoshenko, Wisnom   +26 more
core   +1 more source

Constant Strain Rate Uniaxial Compression of Green Sandstone during SHPB Tests Driven by Pendulum Hammer

Shock and Vibration, 2017
During the Split-Hopkinson pressure bar (SHPB) tests driven by pendulum hammer, employing a proper special shape striker is an effective way to obtain dynamic stress equilibrium condition and to get constant strain rate of the rock specimen.
S. H. Li, W. C. Zhu, L. L. Niu, F. Dai
doaj   +1 more source

Concrete Object Anomaly Detection Using a Nondestructive Automatic Oscillating Impact-Echo Device

Applied Sciences, 2019
The goal of this study was to develop an impact-echo device that can conduct automatic oscillation tests, process signals rapidly, and apply it to concrete object anomaly analysis.
Hsi-Chiang Chou
doaj   +1 more source

Dynamic Behaviour and Catenary Action of Axially-restrained Steel Beam Under Impact Loading [PDF]

, 2017
In this paper, the dynamic behaviour and catenary action of axially restrained steel beam under impact loadings is examined through a combination of experimental and numerical investigations.
ABAQUS, ASCE, Chen, Cowper, Fu, Fujikake, GB50017—2003, He, Huo, Izzuddin, Izzuddin, Johnson, Jones, Jones, Kim, Lee, Li, Liew, Liu, Liu, Munoz-Garcia, National Institute of Standard and Technology (NIST), Saatci, Sadek, Symonds, Unified Facilities Criteria (UFC), Valipour, Wang, Yu   +28 more
core   +1 more source

Impact Resistance Test and Numerical Simulation Study of Scrap Steel Fiber Rubber Concrete

Buildings
The scrap steel fibers (SSF) produced by mechanical processing are processed and added to rubber concrete (RC) to make scrap steel fiber rubber concrete (SSFRC), so as to enhance the strength of the rubber concrete.
Mingshuai Li, Yongtao Gao, Chengzhao Wang, Youzhi Li, Tao Fan   +4 more
doaj   +1 more source

Prediction Model of Drilling Performance for Percussive Rock Drilling Tool

Advances in Civil Engineering, 2020
This study suggests a method for quantitatively estimating the drilling performance of the down-the-hole (DTH) hammer during percussive drilling of rock surfaces. A pneumatic dynamic model of the DTH hammer was developed that considers the mass flow rate
Dae-Ji Kim, Jaewon Kim, Booyeong Lee, Min-Seok Shin, Joo-Young Oh, Jung-Woo Cho, Changheon Song   +6 more
doaj   +1 more source

A Variable-Impulse Hammer Impact Test (VIHIT) Method for Improved Mode Shape Identification

Sensors
The impact hammer, equipped with a force transducer, is a portable and practical tool for inducing measurable excitations in structural health monitoring (SHM). However, its reliability is often limited by uncontrolled factors such as swing power, angle,
Alec Jensen, Charles Riley
doaj   +1 more source

Comparative Shear Tests of Bolt Rods Under Static and Dynamic Loading

Studia Geotechnica et Mechanica, 2020
This article presents the methodology and results of single shear tests of bolt rods under dynamic impact loading generated by means of a drop hammer. Comparative analysis was also performed for bolt rod load capacity, stress and shear work under static ...
Pytlik Andrzej
doaj   +1 more source

Hydrostatic compression on polypropylene foam [PDF]

, 2014
Models currently used to simulate the impact behaviour of polymeric foam at high strain rates use data from mechanical tests. Uniaxial compression is the most common mechanical test used, but the results from this test alone are insufficient to ...
VIOT, Philippe
core   +2 more sources